00 ± 1.12, responders = 2.71 ± 0.94; d = 0.28) and frequency of “giving-way” (non-responders = 5.50 ± 4.70, responders = 4.15 ± 3.76; d = 0.32). A high effect size d value was found for comparing non-responders and responders on the AJFAT (non-responders = 33.38 ± 4.34, responders = 29.79 ± 4.35; d = 0.83). The most important finding of this study was that SRS delivered to the lower leg muscles and ankle ligaments improved dynamic single leg balance by reducing A/P TTS in subjects

with FAI. These findings support the use of subsensory noise as an effective therapy for improving sagittal plane dynamic single leg balance. We CH5424802 did not identify specific neural mechanisms for improving balance with SRS in this study, but we suspect based on the stochastic resonance literature that this complimentary therapy facilitated afferent signal detection and efferent output.12 and 13 Increasing dynamic stability with SRS may have implications on reducing recurrent sprains and allowing individuals with FAI to perform balance exercises

SB431542 in rehabilitation that they may not be able to perform successfully without the use of SRS. Our current results indicate that A/P dynamic balance was improved by 24%. Previous research has indicated that A/P TTS deficits associated with FAI range between 22% and 40% when comparing FAI to stable ankles.11, 19, 20 and 21 Our results of this current study indicate that SRS returns A/P TTS to within normal limits of stable ankles. Previous research has also demonstrated that SRS was effective in improving static single balance in subjects with FAI by 8% over a control condition.9

Thus, clinicians may use this complimentary therapy to facilitate static single leg balance and sagittal plane dynamic single leg balance. This therapy may be critical for individuals with FAI who cannot balance on a single leg or perform single leg hop exercises effectively during rehabilitation. SRS may allow these individuals to perform dynamic single leg balance exercises earlier in therapy, which may facilitate and enhance rehabilitation. Clinically, this SRS treatment effect may translate to reducing recurrent ankle sprains. Researchers for have indicated that balance training decreases ankle sprain injury and improvements in balance between 4% and 9% have been associated with a reduction in sprains.23 Our immediate effect exceeds these improvements, which is one reason we conjecture that this therapy may have implications for decreasing ankle sprains. This theory is purely speculative because we did not study the effects of SRS on recurrent ankle sprains. Future research should explore the clinical effectiveness of SRS on reducing recurrent ankle sprains in subjects with FAI. Afferent signal detection is critical for initiating postural reflexive muscle contractions that enhance balance and SRS may facilitate balance improvements because of its ability to increase sensory feedback.